a narrow metal cylinder, fixed to a rotating shaft or wheel, against which brake shoes or brake bands act.noun the cast-iron drum attached to the hub of a wheel of a motor vehicle fitted with drum brakes See also brake shoe

the fluid used in a brake system to transmit pressure from the brake pedal to the pistons at each wheel, producing the braking action. noun an oily liquid used to transmit pressure in a hydraulic brake or clutch system

the horsepower made available by an engine or turbine for driving machinery other than itself, as measured by a dynamometer. noun the rate at which an engine does work, expressed in horsepower. It is measured by the resistance of an applied brake bhp

a taillight that lights up as the driver of a vehicle steps on the brake pedal to slow down or stop. noun a red light attached to the rear of a motor vehicle that lights up when the brakes are applied, serving as a warning to following drivers Also called stoplight

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